DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
sesmr.co.uk runs on Amazon AWS, with email via Microsoft 365.
- Hosting network
- Amazon AWSAS16509Amazon AWS
- Managed DNS
- Self-hosted / other
- Microsoft 365
- IPv6 (AAAA)
- Enabled
- CAA pinning
- None
Sits alongside 4,999+ other sites on Amazon AWS. Stable here since we started watching (Aug 2, 2026).
The apex and www are the same hosting — the apex via A records, www via a CNAME to sesmr.co.uk.
DNS Records for sesmr.co.uk
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| sesmr.co.uk | A | 0 | 13.43.125.18 | |
| sesmr.co.uk | SOA | 86400 | ns1.rochendns.com cpanel.directrouter.com 2026071701 3600 1800 1209600 86400 | |
| sesmr.co.uk | TXT | 0 | MS=ms11641034 | |
| sesmr.co.uk | TXT | 0 | 0ed1fe018a08baf9ae0ecb4460916f13 | |
| sesmr.co.uk | TXT | 0 | v=spf1 include:spf.protection.outlook.com include:relay.mailchannels.net -all | |
| sesmr.co.uk | MX | 0 | sesmr-co-uk.mail.protection.outlook.com | |
| sesmr.co.uk | AAAA | 0 | 2a05:d01c:ad5:9e02:dea:e4e5:435d:5302 | |
| sesmr.co.uk | NS | 0 | ns2.rochendns.com | |
| sesmr.co.uk | NS | 0 | ns1.rochendns.com | |
| www.sesmr.co.uk | MX | 0 | sesmr-co-uk.mail.protection.outlook.com | |
| www.sesmr.co.uk | NS | 0 | ns1.rochendns.com | |
| www.sesmr.co.uk | NS | 0 | ns2.rochendns.com | |
| www.sesmr.co.uk | AAAA | 0 | 2a05:d01c:ad5:9e02:dea:e4e5:435d:5302 | |
| www.sesmr.co.uk | TXT | 0 | 0ed1fe018a08baf9ae0ecb4460916f13 | |
| www.sesmr.co.uk | TXT | 0 | MS=ms11641034 | |
| www.sesmr.co.uk | TXT | 0 | v=spf1 include:spf.protection.outlook.com include:relay.mailchannels.net -all | |
| www.sesmr.co.uk | CNAME | 0 | sesmr.co.uk | |
| www.sesmr.co.uk | A | 0 | 13.43.125.18 | |
| www.sesmr.co.uk | SOA | 86400 | ns1.rochendns.com cpanel.directrouter.com 2026071701 3600 1800 1209600 86400 |
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Uptime
We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.
DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
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About DNS Records
DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:
- SOA (Start of Authority) - Contains administrative information about the zone
- NS (Nameserver) - Specifies authoritative nameservers for the domain
- A (Address) - Maps a domain to an IPv4 address
- AAAA - Maps a domain to an IPv6 address
- CNAME (Canonical Name) - Creates an alias pointing to another domain
- MX (Mail Exchange) - Specifies mail servers for the domain